Finance Leases Receivable (Details)	3 Months Ended
	Mar. 31, 2017 USD ($) Aircraft	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Loans And Leases Receivable Disclosure [Line Items]
Payment to acquire aircraft	$ 7,354,100	$ 0
Net gain on sales-type finance leases	297,400	0
Net Investment [Abstract]
Gross minimum lease payments receivable	30,904,500		$ 20,829,200
Less unearned interest	(4,759,500)		(3,360,900)
Finance leases receivable	26,145,000		17,468,300
Minimum Future Lease Revenue Payments [Abstract]
Remainder of 2017	4,280,700
2018	5,811,600
2019	7,087,600
2020	5,036,600
2021	5,381,000
Thereafter	3,307,000
Total	30,904,500		$ 20,829,200
Turboprop Aircraft [Member] | Financing lease [member]
Loans And Leases Receivable Disclosure [Line Items]
Net gain on sales-type finance leases	297,400	$ 5,400
Regional Jet Aircraft [Member] | Financing lease [member]
Loans And Leases Receivable Disclosure [Line Items]
Payment to acquire aircraft	$ 7,354,100
Number of aircraft purchased | Aircraft	3